SPDS as already indicated stands for Sellers Property Disclosure Statement and the CLUE for Claim Loss Underwriting Exchange.
In Arizona the CLUE became part of our contract a few years ago as a means for the buyer, during the inspection period, to elicit the cost of insurance of the home based on prior claims.
Before the CLUE was available, many people were through the 10 day inspection period, and then tried to obtain home owners insurance only to find that they were going to get charged a small fortune for Home Owners Insurance based on the prior claims history of the home. At this point, they were unable to cancel the Contract.
The one thing that I would also do is check with the State as they do have prior record of termite treatments on homes, as well as perform a home inspection, and mold, structural, if indicated by the inspector
An investor if they have a Note, may still have home owners insurance and may be able to provide a CLUE.
A bank will not provide one as they will have no record of insurance claims.
Most homes that do not have a SPDS or a CLUE are bank owned or investor owned homes that have not been lived in by the current seller.
If the home happens to be a newly built home from a Builder who is no longer in business, you can also check with the Registrar of Contractors to see if the Home builder had any complaints.
Finally as already mentioned you should make sure that you perform Home inspections as indicated by the Home Inspector.
Good Luck :)